Totally internally reflected ray

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Homework Help Overview

The discussion revolves around a problem involving the behavior of light as it travels through a glass cube, specifically focusing on the phenomenon of total internal reflection. The original poster describes a scenario where a ray of light strikes a face of the cube at a certain angle and subsequently meets another face at a specified angle of incidence.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to understand the angle at which the light ray will emerge from the glass-air boundary after total internal reflection occurs. Some participants question the plane of incidence and seek clarification on how to provide a visual representation of the problem.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the angle of incidence and the conditions for total internal reflection. Guidance has been offered regarding how to share visual aids, but there is no explicit consensus on the solution to the problem yet.

Contextual Notes

There is mention of a critical angle at the glass-air boundary, which is relevant to the discussion of total internal reflection. The original poster expresses uncertainty about the emerging angle, indicating potential gaps in information or understanding.

aurao2003
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Homework Statement


The diagram shows a cube of glass. A ray of light, incident at the centre of a face of the cube, at an
angle of incidence θ, goes on to meet another face at an angle of incidence of 50°, as shown
in Figure 3.
critical angle at the glass-air boundary = 45°
Figure 3
(a) Draw on the diagram the continuation of the path of the ray, showing it passing through the glass
and out into the air.



Homework Equations





The Attempt at a Solution


I know that thw wave will be internally reflected. But I am not sure of the angle at which it will emerge from the glass to air boundary. Please advise.
 
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Show the picture, please.

ehild
 
Sorry. Not sure how to do it.
 
The solution depends on the plane of incidence. What is it?
To load a picture, go to "Go Advanced" then "Manage Attachments".

ehild
 

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